text: /// @ref gtx_hash
  /// @file glm/gtx/hash.hpp
  ///
  /// @see core (dependence)
  ///
  /// @defgroup gtx_hash GLM_GTX_hash
  /// @ingroup gtx
  ///
  /// Include <glm/gtx/hash.hpp> to use the features of this extension.
  ///
  /// Add std::hash support for glm types
  
  #pragma once
  
  #if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
  #	ifndef GLM_ENABLE_EXPERIMENTAL
  #		pragma message("GLM: GLM_GTX_hash is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it.")
  #	else
  #		pragma message("GLM: GLM_GTX_hash extension included")
  #	endif
  #endif
  
  #include <functional>
  
  #include "glm/vec2.hpp"
  #include "glm/vec3.hpp"
  #include "glm/vec4.hpp"
  #include "glm/gtc/vec1.hpp"
  
  #include "glm/gtc/quaternion.hpp"
  #include "dual_quaternion.hpp"
  
  #include "glm/mat2x2.hpp"
  #include "glm/mat2x3.hpp"
  #include "glm/mat2x4.hpp"
  
  #include "glm/mat3x2.hpp"
  #include "glm/mat3x3.hpp"
  #include "glm/mat3x4.hpp"
  
  #include "glm/mat4x2.hpp"
  #include "glm/mat4x3.hpp"
  #include "glm/mat4x4.hpp"
  
  #if !GLM_HAS_CXX11_STL
  #	error "GLM_GTX_hash requires C++11 standard library support"
  #endif
  
  namespace std
  {
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::vec<1, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::vec<1, T, Q> const& v) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::vec<2, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::vec<2, T, Q> const& v) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::vec<3, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::vec<3, T, Q> const& v) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::vec<4, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::vec<4, T, Q> const& v) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::qua<T,Q>>
  	{
  		GLM_FUNC_DECL size_t operator()(glm::qua<T, Q> const& q) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::tdualquat<T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::tdualquat<T,Q> const& q) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<2, 2, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<2, 2, T,Q> const& m) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<2, 3, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<2, 3, T,Q> const& m) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<2, 4, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<2, 4, T,Q> const& m) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<3, 2, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<3, 2, T,Q> const& m) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<3, 3, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<3, 3, T,Q> const& m) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<3, 4, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<3, 4, T,Q> const& m) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<4, 2, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<4, 2, T,Q> const& m) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<4, 3, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<4, 3, T,Q> const& m) const;
  	};
  
  	template<typename T, glm::qualifier Q>
  	struct hash<glm::mat<4, 4, T,Q> >
  	{
  		GLM_FUNC_DECL size_t operator()(glm::mat<4, 4, T,Q> const& m) const;
  	};
  } // namespace std
  
  #include "hash.inl"
  